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Yellow-green Algae
Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. Most live in fresh water, but some are found in marine and soil habitats. They vary from single-celled flagellates to simple colonial and filamentous forms. Xanthophyte chloroplasts contain the photosynthetic pigments chlorophyll ''a'', chlorophyll ''c'', β-carotene, and the carotenoid diadinoxanthin. Unlike other Stramenopiles (heterokonts), their chloroplasts do not contain fucoxanthin, which accounts for their lighter colour. Their storage polysaccharide is chrysolaminarin. Xanthophyte cell walls are produced of cellulose and hemicellulose. They appear to be the closest relatives of the brown algae. Classifications The species now placed in the Xanthophyceae were formerly included in the Chlorophyceae. In 1899, Lüther created the group Heterokontae for green algae with unequal flagella. Pascher (1914) included the Heterokontae in the Chrysophyta. In 1930, Allorge renamed t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Felix Eugen Fritsch
Felix Eugen Fritsch FRS (26 April 1879 – 2 May 1954) was a British biologist. Fritssch was born in Hampstead in London in 1879 where his father owned and operated a school. Fritsch started his career at the University of Munich before moving to research at University College London and also the Royal Botanic Gardens at Kew. He was Professor and Head of the Botanical Department, Queen Mary College (formerly East London College), University of London, from 1911-1948. He was elected a Fellow of the Royal Society in May 1932 and won their Darwin Medal in 1950. He served as president of the Linnean Society from 1949 to 1952 and was awarded the society's Linnean Medal in 1954. He is best known internationally for his comprehensive two-volume ''The Structure and Reproduction of the Algae''; However his co-authored 1927 revised edition of G.S. West's ''A Treatise of the British Freshwater Algae'' of 1904 was also important. He had a great influence through his own research and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorophyceae
The Chlorophyceae, also known as chlorophycean algae, are one of the classes of green algae, within the phylum Chlorophyta. They are a large assemblage of mostly freshwater and terrestrial organisms; many members are important primary producers in the ecosystems they inhabit. Their body plans are diverse and range from single flagellated or non-flagellated cells to colonies or filaments of cells. The class Chlorophyceae has been distinguished on the basis of ultrastructural morphology; molecular traits are also being used to classify taxa within the class. Description Chlorophycean algae are eukaryotic organisms composed of cells which occur in a variety of forms. Depending on the species, Chlorophyceae can grow unicellular (e.g. ''Chlamydomonas)'', colonial (e.g. ''Volvox''), coenocytic (e.g. '' Characiosiphon''), or filamentous (e.g. '' Chaetophora''). In their vegetative state, some members have flagella while others produce them only in reproductive stages; still others never ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambiregnal Protist
Nomenclature codes or codes of nomenclature are the various rulebooks that govern the naming of living organisms. Standardizing the scientific names of biological organisms allows researchers to discuss findings (including the discovery of new species). As the study of biology became increasingly specialized, specific codes were adopted for different types of organism. To an end-user who only deals with names of species, with some awareness that species are assignable to genera, families, and other taxa of higher ranks, it may not be noticeable that there is more than one code, but beyond this basic level these are rather different in the way they work. Binomial Nomenclature In taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traité De Zoologie
The , complete title popularly known as is a 52 volume synthesis of Zoology published between 1948 and 1979 originally under the direction of Pierre-Paul Grassé. A new edition commenced in 1980. The books were not published in order, and some promised parts are yet to appear. The books are written in the French language. Tomes * Tome I, ''Fascicule 1'' (1952) : Phylogénie. Protozoaires : généralités. Flagellés. * Tome I, ''Fascicule 2'' (1953) : Rhizopodes, , Sporozoaires, Cnidosporidies. * Tome II, ''Fascicule 1'' (1984) : Infusoires ciliés. ''Tome co-dirigé avec Pierre de Puytorac.'' * Tome II, ''Fascicule 2'' (1994) : Infusoires ciliés. * Tome III, ''Fascicule 1'' (1994) : Spongiaires, anatomie, physiologie systématique. * Tome III, ''Fascicule 2'' (1997) : Cnidaires (Hydrozoaires, Scyphozoaires et Cubozoaires), Cténaires. ''Tome co-dirigé avec André Franc.'' * Tome III, ''Fascicule 3'' (1953, 1997) : Cnidaires anthozoaires. ''Tome co-dirigé avec Domini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
